Minilla sets META.json's no_index as directory => ['t', 'xt', 'inc', 'share', 'eg', 'examples', 'author'] by default. But if you want to change them, you can set this section variable. If this section is set, specified variables are only used, in fact default settings are not merged.

If you want to pluggable thing, it's already exist dzil :P And if you like a behavior like Minilla, you can use Dist::Milla, the sister project of Minilla. Dist::Milla's behavior is mostly like Minilla.